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Frequency locking in a degenerate Polarization Mixing Optical Parametric Oscillator

机译:简并偏振混合光参量振荡器中的频率锁定

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We report experimental realization of a new type of optical parametric oscillator, in which oscillation is achieved by polarization rotation in a linear retarder, followed by nonlinear mixing of the two polarized beams. The mixing is performed by a type Ⅱ degenerate parametric down conversion in a PPKTP crystal, pumped at 1064nm by a pulsed Nd:YAG laser. A single, linearly polarized beam is generated at the degenerate wavelength. The output spectrum has a narrow linewidth (below the instrumentation bandwidth of 1nm), and is highly stable at degeneracy with respect to variations in the crystal temperature. The frequency locking is explained in terms of balanced roundtrip phase-matching condition.
机译:我们报告了新型光学参量振荡器的实验实现,其中通过在线性延迟器中偏振旋转,然后非线性混合两个偏振光束来实现振荡。通过在脉冲Nd:YAG激光器泵浦的1064nm的PPKTP晶体中通过Ⅱ型简并参数下变频进行混合。在简并的波长处产生单个线性偏振光束。输出光谱具有较窄的线宽(低于1nm的仪器带宽),并且在退变方面相对于晶体温度变化高度稳定。根据平衡的往返相位匹配条件来说明频率锁定。

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